PMB 45/80 is a polymer-modified bitumen characterized by a penetration value of ~45 dmm and a softening point around 80 °C, offering a robust balance of elasticity in cold conditions and shape retention under heat. Enhanced with high-performance polymers, it resists cracking, rutting, and deformation under heavy loads. It’s widely used in highways, bridges, airport runways, and urban junctions where durable, climate-resilient pavement is essential. With easy mixing, strong aggregate adhesion, and support for recycled asphalt, it ensures long-term performance with reduced maintenance.